A kind of preparation method of superfine zinc oxide powder
A technology of zinc oxide powder and zinc oxide, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of large equipment investment, inconvenient source, inconvenient operation, etc., and achieve Uniform particle size distribution, less impurities, and controllable particle size
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Embodiment 1
[0039]Slowly add 27.67 kg (340 moles) of coarse-grained zinc oxide powder into 242.86 liters of acetic acid solution with a concentration of 2.8 mol / L (containing 680 moles of acetic acid). The zinc oxide particles gradually and completely dissolve under stirring to become a transparent liquid, and then add 42.86 kg of Oxalic acid dihydrate (340 moles), a white precipitate was formed, and the precipitate cake and filtrate were obtained by filtration.
[0040] The precipitated filter cake was dried at 105°C to obtain a white powder. The dried white powder was calcined at 500-600° C. for 1.5 hours to obtain 27 kg of zinc oxide powder with an average particle diameter of 100 nanometers. Powder electron microscope photo see figure 2 .
[0041] Filtrate test acidity, add metered glacial acetic acid and water to form 242.86 liters of 2.8mol / L concentration acetic acid solution, repeat the above process to get an average particle diameter of 101 nanometers zinc oxide ultrafine pow...
Embodiment 2
[0043] 27.67 kg (340 moles) of coarse-grained zinc oxide powder was slowly added to 242.86 liters of benzoic acid solution with a concentration of 3.0 mol / L (containing 728.6 moles of benzoic acid), and the zinc oxide particles gradually and completely dissolved under stirring to become a transparent liquid, and then 42.86 Kg of dihydrate oxalic acid (340 moles), a white precipitate was generated, and filtered to obtain the precipitate and filtrate.
[0044] The precipitated filter cake was dried at 105°C to obtain a white powder. The dried white powder was calcined at a temperature of 500-600° C. for 2 hours to obtain 27.67 kg of zinc oxide superfine powder with an average particle diameter of 103 nanometers. Powder electron microscope photo see Figure 4 .
[0045] Filtrate test acidity, add the benzoic acid of metering and water to form 242.86 liters of 3.0mol / L concentration benzoic acid solution, repeat the above-mentioned process to get average particle diameter and be...
Embodiment 3
[0047] Slowly add 27.67 kg (340 moles) of coarse-grained zinc oxide powder into 242.86 liters of acetic acid solution with a concentration of 3.36 mol / L (containing 816 moles of acetic acid). The zinc oxide particles gradually dissolve completely under stirring and become a transparent liquid, and then add 38.57 kg of Oxalic acid dihydrate (306 moles), a white precipitate was formed, and the precipitate and filtrate were obtained by filtration.
[0048] The precipitated filter cake was dried at 105°C to obtain a white powder. The dried white powder was calcined at a temperature of 500-600° C. for 4 hours to obtain 27 kg of zinc oxide superfine powder with an average particle diameter of 85 nanometers. Powder electron microscope photo see Image 6 .
[0049] Filtrate test acidity, add metered acetic acid and water to form 242.86 liters of 2.8mol / L concentration acetic acid solution for mechanical application, repeat the above process to get an average particle diameter of 27 ...
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